JP2020051059A - Fixing structure of digestion tank - Google Patents

Abstract

To provide a fixing structure capable of preventing flotation of a digestion tank installed under a ground surface without depending on fixation to a base concrete.SOLUTION: A fixing structure of a digestion tank fixing a digestion tank 1 by installing the same into an excavation hole 2 formed in a ground surface comprises an anchor member 3 driven in a foundation 20 of the excavation hole 2 and a connection member 4 connecting the anchor member 3 to the digestion tank 1.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a septic tank fixing structure in which a septic tank is embedded and fixed in an excavation hole formed in the ground.

  In a septic tank buried in the ground, when the groundwater level is high, a phenomenon in which the septic tank rises from the installation foundation may occur due to buoyancy generated during pull-out cleaning or the like. In order to prevent this, usually, a septic tank is fixed to an installation foundation by a predetermined method.

  As a conventional structure for fixing a septic tank, for example, a structure having a configuration shown in Patent Literature 1 below is cited. In the fixed structure, foundation concrete is poured into the excavation hole, and a septic tank is connected via a connecting member to an anchor fitting previously embedded in the foundation concrete, whereby the septic tank is attracted onto the foundation concrete. Fixed.

Japanese Utility Model Publication No. 3-80111

  The fixing structure described above fixes the septic tank to the foundation concrete having a sufficient weight to resist the buoyancy of the septic tank. Therefore, the septic tank cannot be fixed in a place where the foundation concrete cannot be cast in the first place. Also, instead of placing the foundation concrete, when trying to protect the septic tank by laying a lightweight and thin foundation plate under the septic tank, even if the septic tank is fixed to the base plate as in the conventional fixing structure, If the groundwater level is high, there is a problem that the buoyancy of the septic tank cannot be countered with a lightweight base plate, and the septic tank rises.

  The present invention provides a fixing structure capable of preventing a septic tank buried in the ground from rising without being fixed to foundation concrete.

The fixing structure of the septic tank according to the present invention includes:
In a septic tank fixing structure in which a septic tank is buried and fixed in an excavation hole formed in the ground,
An anchor member driven into the ground of the excavation hole, and a connecting member connecting the anchor member and the septic tank are provided.

  According to this configuration, the septic tank can be fixed by the anchor member driven into the ground of the excavation hole and the connecting member that connects the anchor member and the septic tank. Therefore, even in an area where the groundwater level is high, the buried septic tank can be fixed without using the foundation concrete, so that the installation period of the septic tank is shortened and the application area of the septic tank is expanded.

  In the present invention, it is preferable that a single base plate or a base plate composed of a plurality of divided bodies is provided between the septic tank and the ground of the excavation hole.

  According to this configuration, the septic tank can be fixed while the bottom surface of the septic tank is protected by the base plate.

  In the present invention, it is preferable that the anchor member and the base plate are configured so as not to interfere with each other.

  According to this configuration, since the anchor member and the base plate are configured so as not to interfere with each other, it is easy to drive the anchor member into the ground. Therefore, both protection of the septic tank by the base plate and fixing of the septic tank by the anchor member can be realized.

  In the present invention, it is preferable that a protrusion protruding in a lateral direction is provided on a side surface of the septic tank, and the protrusion and the anchor member are connected by the connection member.

  According to this configuration, since the connecting member and the anchor member are connected to each other at the protrusion that protrudes in the lateral direction, the connecting member and the anchor member hardly interfere with the side surface of the septic tank. Therefore, the anchor member can be easily driven into the ground in the vertical direction, and the septic tank can be more firmly fixed.

  In the present invention, in a plan view, the edge of the base plate is located outside the edge of the contact portion between the bottom surface of the septic tank and the base plate, and is larger than the connection portion of the protrusion with the connection member. It is preferred that it be located inside.

  According to this configuration, in plan view, the edge portion of the base plate is disposed outside the edge portion of the contact portion between the bottom surface of the septic tank and the base plate, and inside the connection portion of the protrusion with the connection member. Therefore, when the anchor member is driven into the ground, the base plate does not interfere.

In the present invention, in a plan view, the edge of the base plate is disposed outside a connection portion of the protrusion with the connection member,
It is preferable that a through-hole or a notch provided in the base plate is disposed below the connecting portion.

  According to this configuration, even when a relatively large base plate is used, the edge of the base plate in a plan view is disposed outside the connection portion with the connection member in the protrusion. Since the through-hole or the cut-out portion is disposed below the connecting portion of the portion with the connecting member, the base plate does not hinder the driving of the anchor member into the ground.

  In the present invention, it is preferable that the projecting portion is formed integrally with the septic tank.

  According to this configuration, since the protrusion is integrally formed with the septic tank, the fixing force of the anchor member and the connecting member is reliably transmitted to the septic tank via the protrusion. Therefore, the septic tank can be more firmly fixed.

  In the present invention, it is preferable that the protruding portion is formed of a flange portion extending over the entire circumference in the lateral direction of the septic tank.

  According to this configuration, since the connecting member can be attached to the flange portion extending over the entire circumference in the lateral direction of the septic tank, the septic tank can be fixed without having to provide any special structure on the main body of the septic tank.

  In the present invention, it is preferable that the projecting portion is configured by a frame structure attached to a side surface of the septic tank.

  According to this configuration, even when the septic tank does not include the flange portion, the projecting portion can be easily provided on the septic tank by attaching the frame structure.

The fixing structure of the septic tank according to the present invention includes:
In a septic tank fixing structure in which a septic tank is buried and fixed in an excavation hole formed in the ground,
An anchor member driven into the ground of the excavation hole and a winding member wound around the septic tank are provided, and the anchor member and the winding member are connected.

  According to this configuration, the septic tank can be fixed by the anchor member driven into the ground of the excavation hole and the winding member wound around the septic tank. Therefore, even in an area where the groundwater level is high, the buried septic tank can be fixed without using the foundation concrete, and the application area of the septic tank is expanded.

It is a vertical front view which shows the outline of the fixing structure of a septic tank. It is a top view which shows the outline of the fixing structure of a septic tank. It is a top view which shows another embodiment of a base plate. It is a top view which shows another embodiment of a base plate. It is a top view which shows another embodiment of a base plate. It is a vertical side view which shows the outline of another embodiment of the fixing structure of a septic tank. It is a perspective view which shows the outline of another embodiment of the fixing structure of a septic tank. It is a perspective view which shows the outline of another embodiment of the fixing structure of a septic tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Fixed structure of septic tank)
As shown in FIG. 1, the septic tank fixing structure according to the present embodiment includes an anchor member 3 that is driven into the ground 20 of the excavation hole 2, and a connecting member 4 that connects the anchor member 3 and the septic tank 1.

  The septic tank 1 applicable to the present invention is not particularly limited. For example, a small septic tank (about 5 to 10 persons), a medium-sized septic tank (about 10 to 50 persons), and a large septic tank (about 50 to 10000). To a human tank).

  It is preferable that the septic tank 1 to be applied has a flange portion 11 extending over the entire circumference in the lateral direction. For example, the septic tank 1 is configured by joining an upper tank and a lower tank, and by joining and fixing joint flanges integrally formed in the upper tank and the lower tank, respectively, thereby forming a horizontal tank. A flange portion 11 (an example of a protruding portion) is formed in the septic tank 1 over the entire circumference.

  An example of the anchor member 3 applicable to the present invention is a spiral pile, but the shape of the pile is not limited to this, and the pile can be driven into the ground 20 to stably fix the septic tank 1. Anything is fine.

  As the connection member 4 applicable to the present invention, for example, a known member such as a ring member, a shackle, an eyebolt, a turnbuckle, a plate member, or the like, may be used alone or arbitrarily combined as needed as the connection member 4. May be configured. Further, the connecting member 4 is not limited to a metal member, and may be made of a resin-based composite material such as fiber reinforced plastic (FRP).

  The fixing structure of the septic tank according to the present embodiment may include the split chestnut layer 5 as necessary. The split chestnut layer 5 flattens the bottom surface of the excavation hole 2 formed in the ground G, and the top portion of the septic tank 1 (such as a lid of the inspection port) when placed in the excavation hole 2 has substantially the same level as the ground G. The thickness is adjusted so that The thickness of the split chestnut layer 5 is usually less than 200 mm, but may be more than 200 mm in some cases. It should be noted that as the split chestnut stone forming the split chestnut layer 5, a known split stone may be used.

  The septic tank fixing structure according to the present embodiment may include a base plate 6 below the septic tank 1 as necessary. The base plate 6 protects the bottom surface of the septic tank 1 and is preferably thin and lightweight. As the base plate 6, for example, a plate made of a fiber-reinforced concrete molded body is preferably used. For example, as a molded body of fiber reinforced concrete applicable to a septic tank for five people, the length of the long side is about 1400 mm, the length of the short side is about 800 mm, the thickness is about 20 mm, the weight is about 48 kg, and the specific gravity is 2.1. To 2.3. Such a fiber-reinforced concrete molded product is a conventional base concrete bottom plate (long side length about 1600 mm, short side length about 930 mm, thickness about 100 mm, heavy weight) which is also applied to a septic tank for five people. (Approximately 332 kg), the workability is good because it is very thin and light.

  The shape of the base plate 6 according to the present embodiment is generally rectangular, but may be a shape other than rectangular according to the shape of the septic tank 1. The size of the base plate 6 in plan view is such that the edge E1 of the base plate 6 is outside the edge E2 of the contact portion between the bottom surface of the septic tank 1 and the base plate 6, and the connecting member in the flange 11 Desirably, the size is such that it is arranged inside the connection portion 12 with the fourth portion 4. According to this configuration, since the anchor member 3 and the base plate 6 do not interfere with each other, the base plate 6 does not interfere when the anchor member 3 is driven into the ground 20.

  Further, a relatively large base plate 6 may be used in which the edge of the base plate 6 is disposed outside the connection portion 12 with the connection member 4 in the flange portion 11 in plan view. In this case, for example, as shown in FIG. 3, a through hole 60 is provided in the base plate 6, or a notch 61 is provided in the base plate 6 as shown in FIGS. 4 and 5 (in FIG. 5, Notches 61 are provided at the four corners of the base plate 6), and the anchor member 3 is driven into the positions of the through holes 60 or the notches 61.

  That is, in the fixing structure of the septic tank in this case, these through-holes 60 or cutouts 61 are arranged below the connecting portion 12 of the flange 11 with the connecting member 4. For this reason, even when a large base plate 6 is used such that the edge of the flange portion 11 is arranged inside the base plate 6 in a plan view, the flange portion 11 is located below the connection portion 12 with the connection member 4 in the flange portion 11. Since the base plate 6 does not exist, the anchor member 3 and the base plate 6 do not interfere with each other, and the base plate 6 does not hinder the driving of the anchor member 3 into the ground 20.

  The through-hole portion 60 of the base plate 6 shown in FIG. 3 has a circular shape, but the shape is not limited thereto, and may be a rectangular shape, for example. The cutout portion 61 of the base plate 6 shown in FIG. 4 has a semicircular shape, but the shape is not limited thereto, and may be a rectangular shape, for example.

  Further, the through-hole 60 of the base plate 6 can be used when the base plate 6 is carried, for example, by putting a finger of an operator on the through-hole 60.

(How to fix the septic tank)
Hereinafter, as an example of a method for fixing the septic tank 1, a method for fixing the septic tank 1 having the flange portion 11 will be described. At the four corners of the flange portion 11 of the septic tank 1 in plan view, holes 12 (see FIG. 2: an example of a connecting portion) penetrating vertically are formed.

  First, the ground G is excavated using a known excavating machine or the like, and an excavation hole 2 corresponding to the size of the septic tank 1 to be buried is formed.

  A split stone is spread on the bottom surface of the excavation hole 2 and flattened to form a split layer 5 having a predetermined thickness. Then, the base plate 6 is laid on the split chestnut layer 5, and the septic tank 1 is further set on the base plate 6.

  The anchor member 3 is driven into the ground 20 of the excavation hole 2. Usually, as shown in FIG. 2, four anchor members 3 are driven into predetermined positions to fix the four corners of the flange portion 11 of the septic tank 1 in plan view. In addition, about the fixing | fixed part of the septic tank 1, it is not limited to the four corners of the flange part 11, and the position and number may be changed suitably.

  It is desirable to drive the anchor member 3 into the ground 20 after avoiding as much as possible the split stone of the split layer 5 at the position where the anchor member 3 is driven. The anchor member 3 is desirably driven in a vertical direction, but may be driven in an oblique direction as needed as long as the anchor member 3 is in a state of being firmly driven.

  The size of the base plate 6 in the present embodiment in plan view is larger than the bottom surface of the septic tank 1 and smaller than the size of the flange portion 11. For this reason, when the anchor member 3 is driven into the ground 20, the base plate 6 is hardly obstructed, and both the protection of the septic tank 1 by the base plate 6 and the fixing of the septic tank 1 by the anchor member 3 can be realized.

  When the anchor member 3 is driven into the ground 20, the anchor member 3 and the septic tank 1 are connected by the connecting member 4. In the present embodiment, a case where an eyebolt 41, a shackle 40, a turnbuckle 42, a connection plate 43, and a ring member 44 are used as an example of the connection member 4 will be described.

An eye bolt 41 is provided in each of the four holes 12 (see FIG. 2) of the flange portion 11, and one end of the turnbuckle 42 and the eye bolt 41 are connected via the ring member 44 and the connection plate 43. Further, the other end of the turnbuckle 42 is connected to the anchor member 3 via the shackle 40, and the septic tank 1 is firmly fixed by tightening the turnbuckle 42.
Finally, soil is put on the fixed septic tank 1 and the excavation hole 2 is backfilled to complete the work.

  According to the above-described septic tank fixing structure and fixing method, the septic tank can be fixed by the anchor member that is driven into the ground of the excavation hole, and the connecting member that connects the anchor member and the septic tank. In addition, the buried septic tank can be fixed without using the foundation concrete, so that the construction period of the septic tank is shortened and the application area of the septic tank is expanded.

[Another embodiment]
1. In the above-described embodiment, the flange 11 that is integrally formed with the septic tank is illustrated as the protrusion that projects laterally on the side surface of the septic tank. However, the present invention is not limited to this configuration. Alternatively, for example, as shown in FIG. 6, the projecting portion may be configured by a frame structure 7 (separate from the septic tank) attached to the side surface of the septic tank. The frame structure 7 may be composed of, for example, a headband iron frame.

  2. As shown in FIG. 7, by using a net-shaped wrapping member 8 wrapped around the septic tank 1 and connecting the wrapped member 8 to the anchor member 3 via the connecting member 4, the clarified tank 1 is connected. It may be fixed. Alternatively, as shown in FIG. 8, by using a plurality of band members 9 wound around the septic tank 1 and connecting the band members 9 to the anchor members 3 via the connecting members 4, the septic tank 1 is formed. It may be fixed.

  3. The projecting portion does not have to cover the entire circumference in the lateral direction of the septic tank, and the projecting portion may be provided at a plurality of locations on the side surface of the septic tank.

  4. In the above-described embodiment, a configuration in which one base plate is laid is shown. However, the present invention is not limited to this configuration. In addition, for example, a configuration in which a base plate including a plurality of divided bodies is laid It is good. In the case of a base plate including a plurality of divided bodies, the base plate may include a divided body having the through-hole portion 60 in the above-described embodiment and a divided body having no through-hole portion 60. is there.

  5. In the above-described embodiment, after splitting stones on the bottom surface of the excavation hole, crushed crushed stone may be spread over the splitting stones to form a splitting layer. In some cases, only crushed stone may be laid without using split stone, a base plate may be laid directly on the bottom of the drilled hole without split stone or crushed stone, or split stone may be laid. The septic tank may be directly installed on the bottom surface of the excavation hole without using any of the crushed stone and the base plate. When the burial depth of the septic tank is deep (that is, when the drilling hole is deep, etc.), if necessary, a well-known raising member is provided at the inspection port at the upper part of the septic tank, so that the septic tank and the ground are provided. May be connected.

  The present invention can be applied not only to small-sized septic tanks but also to medium-sized and large-sized septic tanks.

1: Septic tank 11: Flange part (an example of a protruding part)
12: Hole (connection part)
2: excavation hole 20: ground 3: anchor member 4: connecting member 40: shackle 41: eyebolt 42: turnbuckle 43: connecting plate 44: ring member 5: split chestnut layer 6: base plate 60: through hole 61: cut Chipped part 7: Frame structure (an example of a protruding part)
8: Wrapping member 9: Band member G: Ground E1, E2: Edge

Claims (10)

In a septic tank fixing structure in which a septic tank is buried and fixed in an excavation hole formed in the ground,
A septic tank fixing structure, comprising: an anchor member driven into the ground of the excavation hole; and a connecting member that connects the anchor member and the septic tank.   2. The fixing structure of a septic tank according to claim 1, wherein a single basic plate or a basic plate composed of a plurality of divided bodies is provided between the septic tank and the ground of the excavation hole. 3.   The fixing structure for a septic tank according to claim 2, wherein the anchor member and the base plate are configured so as not to interfere with each other.   4. The fixing structure for a septic tank according to claim 3, further comprising a projecting portion projecting laterally on a side surface of the septic tank, wherein the connecting member connects the projecting portion and the anchor member. 5.   In plan view, the edge of the base plate is disposed outside the edge of the contact portion between the bottom surface of the septic tank and the base plate, and inside the connection portion of the protrusion with the connection member. A fixing structure for the septic tank according to claim 4. In a plan view, the edge of the base plate is disposed outside a connection portion of the protrusion with the connection member,
The fixing structure for a septic tank according to claim 4, wherein a through hole or a cutout provided in the base plate is disposed below the connection portion.   The structure for fixing a septic tank according to any one of claims 4 to 6, wherein the protrusion is integrally formed with the septic tank.   The fixing structure for a septic tank according to claim 7, wherein the protruding portion is configured by a flange portion extending over the entire circumference in a lateral direction of the septic tank.   The fixing structure for a septic tank according to any one of claims 4 to 6, wherein the projecting portion is configured by a frame structure attached to a side surface of the septic tank. In a septic tank fixing structure in which a septic tank is buried and fixed in an excavation hole formed in the ground,
A purification tank fixing structure, comprising: an anchor member driven into the ground of the excavation hole; and a winding member wound around the septic tank, wherein the anchor member and the winding member are connected.

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